CVE-2026-70097

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Race Condition in Windows VBS Enclave Allows Local Spoofing

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Microsoft Corporation

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to perform spoofing locally.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-13

Last Modified

2026-10-13

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-70097

EUVD

EUVD-2026-99156

Affected Vendors & Products

Vendor	Product	Version / Range
Microsoft	Windows	11 Version 24H2 10.0.26100.0
Microsoft	Windows	11 Version 25H2 10.0.26200.0
Microsoft	Windows	11 version 26H1 10.0.28000.0
Microsoft	Windows	11 Version 26H2 10.0.26300.0
Microsoft	Windows	Server 2022 10.0.20348.0
Microsoft	Windows	Server 2025 10.0.26100.0
Microsoft	Windows	Server 2025 (Server Core installation) 10.0.26100.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-362	The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Attack-Flow Graph

Executive Summary

This is a race condition vulnerability in Windows Virtualization-Based Security (VBS) Enclave. It allows an authorized attacker to perform spoofing by exploiting improper synchronization during concurrent execution using shared resources.

Impact Analysis

An attacker could exploit this to impersonate legitimate processes or users within the VBS Enclave, potentially gaining unauthorized access or performing actions under false identities.

Compliance Impact

The vulnerability allows local spoofing via a race condition in Windows VBS Enclave, which could enable unauthorized access or impersonation. This may impact compliance by potentially violating integrity controls required under GDPR (data integrity) and HIPAA (access controls and integrity of protected health information).

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the race condition in Windows Virtualization-Based Security (VBS) Enclave. Monitor Microsoft's update guide for patches specific to CVE-2026-70097.

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